I think Gully Dwarves work well in this trilogy, because the authors know to use them to balance out the deadly seriousness of a likely suicidal charge on a dragon's lair, and to help show Raist's soft side. In later works, many authors don't do those, so you just end up with a bunch of idiot characters who are there because "lol stupid dwarves." and they grate a lot more on the story.

Theres one trilogy in particular that has a gully dwarf as a PoV character, and its... really, really not great. Everything he accomplishes he does by accident.